Emc Corporation

John Kemeny

David W Harvey

Bradford B Glade

Matthew D Waxman

Lee W VanTine

Michael J McCarthy

Peter John McCann

Douglas Sullivan

James A Wentworth

Jun Ohama

Naizhong Chiu Qui

William B Whalen

Xueying Shen

A method and system for managing allocation of storage resources, comprises the steps of: the storage network management system allocating one or more virtual data storage volumes for use by a host computer; the storage network management system presenting the virtual data storage volumes to the host computer as representative of available physical storage on the one or more storage arrays, but not allocating physical data storage for the virtual data storage volumes, wherein the virtual data storage volumes can include regions that are either allocated to physical storage or are unallocated to physical storage; the storage management system creating a data storage pool that includes the one and the more data storage arrays; and upon receiving a write request to the virtual data volume that covers an unallocated region of the volume, the storage network management system allocating physical storage from the storage pool for the virtual data volume.

System and method for managing provisioning of storage resources in a network with virtualization of resources in such a network

An architecture for protecting against failure in a switched storage network using virtualization.

Failure protection in an environment including virtualization of networked storage resources

This invention is a system and method for managing provisioning of resources for one or more data storage networks using a new architecture.

A method, system, and program product for managing a plurality of storage area networks including a plurality of data storage volumes and one or more hosts, wherein the volumes are in a storage network, wherein the network includes one or more processors in the network, the program product comprising a computer-readable storage medium encoded with computer-executable program code enabling controlling virtualization of volumes in the storage network and managing a SCSI virtualization service; wherein the volume virtualization controller service supports virtualization enabling virtual Storage Area Networks (SAN)s by parsing between front-end SANs and back-end SANs regardless of physical configuration of the front and back-end SANs, to enable mapping from virtual volumes to back-end storage elements across virtual SANs.

System and method for virtualization of networked storage resources

An electronic device provides electronic access to a dataset representing meaningful information. The electronic device generates a first subset permutation based on a first subset of the dataset, and generates a second subset permutation based on a second subset of the dataset. Each subset of the dataset includes a series of data elements having a particular fixed bit-length. The first subset permutation includes a rearrangement of the series of data elements of the first subset. Similarly, the second subset permutation includes a rearrangement of the series of data elements of the second subset. The electronic device further forms an electronic aggregation based on the first subset permutation and the second subset permutation, and generates an aggregation permutation based on the electronic aggregation. The aggregation permutation includes a rearrangement of portions of the electronic aggregation. The meaningful information is fully recoverable from the aggregation permutation.

Utilizing recursive application of a reversible transform which involves lexicographic ordering

This invention is a system and method for managing allocation of storage resources in a storage network, the storage network including physical data storage on a plurality of storage arrays that are in the storage network, and the network is in communication with one or more hosts and the network further includes a storage network management system, communicatively coupled to the storage arrays via the network, the storage management system includes a storage virtualizer capable of intercepting and virtualizing an IO stream from the one or more hosts and which storage network management system further includes a storage and switch controller in communication with the storage virtualizer for storage network management.

An architecture for managing a plurality of storage area networks including a plurality of data storage volumes and one or more hosts, wherein the volumes are in a switched storage network in the storage area networks the architecture comprising one or more processors in communication with switching capability for the switched storage network, wherein the one or more processors include program logic for embodying logical constructions of a storage presentation layer including target virtualization and logical unit (LU) virtualization; and a volume presentation layer including volume virtualization for replication of data.

Architecture for virtualization of networked storage resources

A system and method for managing one or more Storage Area Networks (SAN), in which the one or more SAN's consist of one or more data storage volumes and one or more hosts. Whereas the one or more data storage volumes are in a switched storage network.

An architecture for managing a switched storage network consisting of one or more data storage volumes and one or more hosts. The data storage volumes are in a switched storage network. One or more processors provide the switching capability for the switched storage network. The one or more processors are capable of embodying logical constructions of a storage presentation layer and a volume presentation layer.

Disclosed methods and systems relate to characterizing a dynamic performance quality of service available from a storage element within a storage system. An exemplary method includes initiating a known I/O request to the storage element; measuring a time the storage element takes to respond to the known I/O request; and reporting a measure of the quality of service available from the storage element. One implementation of the method further includes using the time measurement and an estimation algorithm to calculate the quality of service and adjusting the load on the storage element based on the quality of service.

Methods and systems for back end characterization using I/O sampling

A point in time copy of a data set is provided using a two-phase snapshot copy operation. When a write request is received, as part of the first phase, a chunk including the target location of the write request is determined. Using a 'copy on first write' technique, the data at the target location is copied to a snap data area in an allocated data area that is the size of the chunk. A first map for the data set is updated to include up to three entries representing a mapping of the segment including the target location. A second map for the snap data area is updated to include a single entry for the copy of the data from the target location. As part of the second phase, the multiple entries in the first map are coalesced into a single entry after the remaining portions of the chunk are copied to the data area in the snap data area.

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Westford, MA, United States of America

John Kemeny